Separate POCO Object classes and DBContext from Entity Framework 6 Model
.net, c#, entity-framework-6
Solution
Absolute paths are not required. It looks like your relative path is not correct. I am using EF6.1 and I have the POCO classes in a separate project. This is how I got it to work in VS 2013.
- Created a Class Library Project and added an `ADO.NET Entity Data Model`. This project will contain the `DB Context`.
- Added a new `EF6.x DbContext Generator` item to the `DBContext` project.
- Created a new Class Library Project. This project will contain the `POCO` objects.
- Moved the `[Project Name]Model.tt` file from the `DbContext` project to the `POCO` project.
- Edited the `[Project Name]Model.tt` file. On line 5, I changed: `const string inputFile = @"SampleModel.edmx";` to: `const string inputFile = @"..\DbContext\SampleModel.edmx";`
- Added a reference in the `DbContext` project to the `POCO` project.
If you are using VS 2013, you can debug the template to see how your relative path is being resolved.
- Add a breakpoint to your `.tt` file.
- Right-click the `.tt` file in the Solution Explorer and select "Debug T4 Template".
Problem
I started to use Entity Framework 6.0.1 version. I want to separate the generated DbContext and POCO template classes to different class library from the model. I spent a few hours solve the problem without any success. If I create a new class library, add EF 6 EntityObject Generator and fill the following template variable: `SourceCsdlPath = @"..\..\DataAccess\Model.edmx"`, Get the following error in the error list after building: Error 2 Running transformation: System.IO.FileNotFoundException: Unable to locate file File name: 'C:\Source\EFsource\POCO....\DataAccess\SZOSZRDBModel.edmx' Server stack trace: at Microsoft.VisualStudio.TextTemplating.VSHost.TextTemplatingService.ResolvePath(String path) at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Microsoft.VisualStudio.TextTemplating.ITextTemplatingEngineHost.ResolvePath(String path) at Microsoft.VisualStudio.TextTemplating31479401930D2C4820ACF71C66B5389A24A5053726798D9718DB676B3FFA30A3454B3CB1EDE2E1C267D5278B1528860C072E81A0E4647BC23993669604048FCD.GeneratedTextTransformation.ApplyUserSettings(UserSettings userSettings) at Microsoft.VisualStudio.TextTemplating31479401930D2C4820ACF71C66B5389A24A5053726798D9718DB676B3FFA30A3454B3CB1EDE2E1C267D5278B1528860C072E81A0E4647BC23993669604048FCD.GeneratedTextTransformation.TransformText() The Error message is clear, but i do not know, how to set Model path without full absolute path. I am not sure, using newest version of entity framework is the best idea...